Spiral tool



March 24, 1925. 1,531,086

T. J. FEGLEY ET AL SPIRAL TOOL Filed Aug. 16. 1923 2 Sheets-SheetI l L.Hlrd MM5. w f

may@ M14/Mm March 24. 1925. 1,531,086

T. J. FEGLEY ET AL sPiRAL TOOL Filed Aug. 16. 192s 2 sheets-sheet 2dotted lines Patented Mar. 24, 1925.

y UNITED STATES THOMAS .IITEGLEY AND GEORGE o. Lnoronn, or enrnannnrnre,PENNSYLVANIA,

i CORPORATION OF PENNSYLVANIA.

CO., OF PHILADELPHIA, PENNSYLVANIA, A

SPIRAL TOOL.

Application filed August 16, 1923. Serial No. 657,755.

To all fic/om t mog/f concern:

Beit known that we, THOMAS J. Fneiinr and GEORGE O. LEOPOLD, citizens ofthe United States, residing in Philadelphia, Pennsylvania, `haveinvented certain Im.- provements in Spiral Tools, of which the followingis a rspecilicationl This invention relates to certain improvements 'inspiral ltools of the type in which a spiral spindle reoiprocates withina tubular casing. f y n `.The object of this invention is to provide asimple and elifective means for' holdingy the spiral spindle within!.the casing vagainst f the pressure of thekprojecting spring.

In the accompanying drawings:

JFig. 1 isa sidelview of a spiral screw driver illustrating ourinvention Fig. 2is a sectional view of that portion oit the screw driverto which our invention relates, the cam ring being in section;

Fig. 3 is a vertical sectional view on the line Sfe, Fig. 2; 4 i

Fig. l is asectionalplan view on the line 444:, Fig. 3;

Fig. 5 is a sectional plan view on the line 5-5, Figf; n

Fig. 6 is a sectional plan view on the line 6 6, Fig. 3; showing the camring in position to allow the spindle to move freely;

Fig. 7 is a view on the saine lineas Fig. 6, showing the cam ringshifted to lock the `spindle to the casing;

Fig. 8 is a detached perspective view of parts of the mechanism;

Fig. 9 is a view illustrating a modification of the invention;

Fig. 10 is a view, partly in section, illustrating another modification;

Fig. 11 is a sectional view on the line 11-11, Fig. 10; 4 l

Fig. 12is a view, partly in section, illustrating still anothermodification; and

Fig. 13 is a sectional view on the line 15S-13, Fig. 12.

Referring in the first instance to Figs. 1 to 8 of the drawings, 1 is ahollow casing having a handle 2 at one end and anv enlarged section. 3at the opposite end, in which `is the ratchet mechanism shown by inFig. 1. This mechanism is controlled by a shifter 4:. in the vmannercommon to this type of tool. The enlargement 3 is enclosed within ashell ratchet 5. G is Aa spindle adapted to reciprocate within thecasing. This spindle has spiral grooves 8 cut therein, as shown in Fig.S. At the lower end of the spindle is an 'annular groove 9, which isadapted to receive a locking key 10 that is moved .into posi tion in thegroove when it is desired to lock the spindle within the casing. At thee5'- treme end of the spindle is a chuck 11 tor holding a screw driver,or drill hit.

The Outer end of the enlarged portion 3 of' the casing has an internalscrew thread, Fig. 2, to which is adapted a thread or' a plug`12, whichhas a central opening for the passage of the spiral spindle 6, Fig.- 3.The plug 12- has a groove 13, in which is a spring 1li. This spring hasa curved enlargement 15 that extends intov recesses 16 1u the walls ofthe groove. The spring is confined in position hy a cam ring 1T, whichv.is wider than the groove and lit-s the en larged portion oit the plug12. This portion is cut away, as shown in Fig. 8, to allow for the freemovement of the cam portion 18 loit the ring 17. The free end of thespring 111 has a lateral portion 19, and also has an extension 19a,which prevents the spring jumping out of the opening 2O.` The lateralportion 19 enters the opening 2O in the key 10, which is located in aslot 21 cut in the plug 12. The slot extends into the opening in whichthe spiral spindle reciprocates so that .the key 10, when projected hythe cam ring 17, will enter the groove 9 in the spindle, holding it`against longitudinal movement. The key is made as clearly shown in Fig.8, and has a beveled portion 22, in which the cam 18 rests when the camring is in the position shown in Fig. 6. Then the cam ring is turned tothel position shown in Fig. 7, the cam 18 rides upon the edge of the keyand forces it into the groove 9 ot the spindle. The face of the cam isflat, as shown, and is formed on the ring 17 by crimping the ring, asshown clearly in Fig. 8.

In the Ordinary operation of a spiral. screw driver, a spring 23, Fig.1, retract-s the handle and the casing. When the handle ispressed'torward, the spiral spindle is turned in a given direction,according to 'theposition of the shifter 4l. ln order to lock thespindle within the casing, as shown in Fig. 1, the key 10is provided,which, on

turning the cam ring 1T, is projected into the groove'9 ot the spindle,holding the spindle against the pressure ot the spring Q3. On reversingthe movement of the cani ring, the spring la retracts the key l0 and thespring 9.8 is free to project the spindle.

In Fig. 9, a modilication is illustrated, in which the spring 14 has'rounded extentions 19a, which rest in recesses 16a in the walls of theplug 12a, conining the rear end ot the spring` to the plug.

In Figs. 10 and ll, another modifiration is shown, in which the innerend oit the spring lllb is bent. This portion ot' the spring extendsunder ears 16D, pressed from the metal of the plug 12b. V

In Figs. 12 and 13, still another modification is illustrated, in whichVthe spring lll is clamped to the plug by bars 160, contining the rearend or" the spring to the plug.

The constructions hereinbefore described are not intricate and the camring can be readily manipulated to lock, or unlock, the spindle, whendesired.

lVe claim:

l. rlhe combination in a spiral tool, ott a casing; a` grooved spindlelocated Within the casing; a spring tor projecting the spindle; a plugsecured to the end of the casing, said plug having an annular groovetherein and a slot communicating with the groove; a segmental keymounted in the slot; a spring having enlargements at one end extendinginto the recesses in the Walls of the groove, said spring having alateral portion at its opposite end extending into an opening in the keyand tending to force the key outwards; and a cam ring having` a camportion acting on the key to project it into the groove ot' the spindlewhen the spindle is retracted.

2. rThe combination in means for locking aV spindle to the casing oil aspiral tool, of a casing having a plug; a spindle having a groove; a keyin the plugv arranged to be moved into the groove to lock the spindle,said key having an opening; a spring having a lateral extensionprojecting into the opening, the opposite end of the spring having acurved enlargement, the plug having a recess to receive the enlargement;and a cam ring enclosing the key and the spring, said cam ring beingarranged to act upon the key to :torce it into the groove of thespindle.

3. The combination in means for locking a spindle to the casing -oif aspiral tool, oit' a casing; a plug secured'to the casing; a spindleextending through the plug and into theA casing and having an annulargroove therein; a laterally movable key in the plug; a cam ring formoving the key into the groove oit the spring; and a spring, forretracting the key, secured at one end to the plug, said spring having alateral portion engaging the key and also having lateral extension,which holds it in engagement With the key.

THOMAS J. FEGLEY. GEORGE O. LEOPOLD.

